Water connection



Jan. 17, 1933. ,5 TERRY 1,894,801

I WATER CONNECTION Filed Sept. 50; 1931 I J 16 J F 2 4/18 INVENTONEd'waadFZcvk 6 4 m4] 3'0 2 HLS/ATTQRNEY Patented Jan. 17, 1933 UNITEDSTATES PATENT oFFicE EDWARD F. TERRY, OF PHILLIPSBURG, NEW'JERSEY,ASSIGNOR TO INGERSOLIi-RAIND COMPANY, OF JERSEY CITY, NEW JERSEY, ACORPORATION OF NEW JERSEY WATER CONNECTION Application filed September30,1931. Serial No. 566,024.

This invention relates to rock drills but more particularly to waterconnections for rock drills.

The objects of this invention are to enable the construction of a watertube connection which shall be simple and economical to construct and awater tube connection which shall be leak-proof and which will preventtangling and kinking of the water hose as the rock drill is moved fromone position to another by the operator.

Other objects will be in part obvious and in part pointed outhereinafter.

The objects mentioned above are obtained by the mechanism shown in theaccompanying drawin which is a longitudinal view of a rock dr1ll partlyin section.

Referring more particularly to the drawing, 10 designates a rock drillthe operation and construction of which need not be described since itforms no part of the invention. The rock drill comprises a cylinder 12 aback head 14 and a front head 16. Situated in the front head in theusual position is a hollow drill steel or working implement 18. A hammerpiston delivers blows of impact to the drill steel 18 through the mediumof an anvil block 22. As is well known in the art, it is necessary insome drilling operations to wash away the rock dust and pulverized rockwhich are formed in the drill hole. This cleansing process isaccomplished in a variety of ways but chiefly by forcing water through ahollow drill steel. In the present case a water tube 24 leads from theback head 14 through the rock drill passing through apertures 26, 28 and30 in a piston 20, the anvil block 22 and the drill steel 18respectively. Water passing through the tube 24 is delivered to thehollow 80 in the drill steel 18 under sufficient ressure to force outthe rock cuttings.

In order to lead water into the water tube 24 the back head 14 isprovided with the following construction:

An aperture 32 is formed in the back head and a portion of the aperture32 is threaded as shown at 34. A nut 36 having an extension 38 and abore or an aperture 40 is provided with threads 42 on the extension 38.

The threads 42 are adapted to cooperate with the threaded portion 34 ofthe recess 32.

A connection or plug 44 having a bore 46 fits slidably into the aperture40 and has a shoulder 47 which seats against the outer end of the nut36. A shoulder 48 is formed in the bore 46 by reducing the size of thebore as shown at 50. The upper end of the bore 46 is provided withthreads 52 which are adapted to engage a threaded extension 54 on a plug56. An extension 58 protrudes from the plug 44 at an angle ofsubstantially 90. A supply passage 60 is formed in the extension 58 andopens into the bore 46 at a point intermediate the ends of said bore.The extension 58 is threaded as at 62 to receive a hose coupling.

A cylindrical extension 64 on the plug 56 fits slidably in the bore 46of the plug 44.

The assembly and operation of the device is as follows:

The plug 44 is inserted in the bore 40 of the nut 36. A collar 66 isplaced over a reduced end 68 of the plug 44 and the plug 44 is peenedover as shown at 70. The collar 66 be freely rotatable on the plug 44and seats against the front or inner end of the nut 36. The plug 44 isthus free to rotate within the nut 36 but is firmly secured againstwithdrawal. The next operation is to thread the nut 36 into the threads34. Packing 72 is placed in the recess 46 upon the shoulder 48 and thewater tube 24 inserted through the packing and the cylinder into thedrill steel 18. The plug-nut 56 is then screwed into place to compressthe packing about the rear end of the tubeto hold the water tube 24 andthe packing 72 firmly in place. Water enters passage 60 from a source ofsupply (not shown) and flows through passages 74 and 7 6 to the watertube 24 and thence to the drilled hole. The method of construction andassembly described above makes a water tight connection, in a simplemanner and permits swivelling of the hose connection 62 about the axisof the drill 10. Thus among others the objects hereinbefore mentionedare accomplished.

I claim:

In a fluid actuated rock drill, the combination of a cylinder, :1 backhead for the cylinder having a threaded recess, a hollow nut e threadedinto the recess, a connection freely rotatable in the nut and having abore, :1 lateral extension on the connection having a supply psssageoning into the bore at a point intermediate t e ends of the bore,shoulders 0n the connection seating against the ends of the nut, ashoulder in the bore, a, water tube in the connection, packing materialseated upon the last mentioned shoulder and encircling the water tube, aplug in the bore to compress the packing material, and a passa 'e in theplug to convey Water from the supp y passage to the tube.

In testimony whereof I have signed this specification.

EDWABD F. TERRY.

